Question

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Answer 1

1. Stomach
2. it makes the food soft so that it is digested easily.
3. Heating effect of electric current
4. it is connected parallely to the circuit.
5. (a) 1. it stores vitamin A, D, E, and K. 2. It makes the bile juice.

(b) it stores the bile juice secreted by the liver. 2. it concentrates the salt balance in bile juice.

(c) 1. it increases the absorptive area in small intestine. 2. it also absorbs the digested food in the small intestine.

Answer 2

Explanation:1. In small intestine

2. Hydrochloric acid helps your body to break down, digest, and absorb nutrients such as protein. The hydrochloric acid found in the stomach facilitates digestion by disintegrating complex large food molecules into simpler molecules. The acid activates the pepsinogen enzyme required to digest proteins.

3. An electric bulb works on the principle of hearing effect of current. It consists of a tungsten filament with a coating of thorium. This filament gets heated up to emit light when current passes through it.

4.parallel

5. (a) The liver regulates most chemical levels in the blood and excretes a product called bile. This helps carry away waste products from the liver. All the blood leaving the stomach and intestines passes through the liver

.(b) The gallbladder stores bile produced by the liver. After meals, the gallbladder is empty and flat, like a deflated balloon. Before a meal, the gallbladder may be full of bile and about the size of a small pear.

(c)The villi of the small intestine project into the intestinal cavity, greatly increasing the surface area for food absorption and adding digestive secretions. The villi number about 10 to 40 per square millimetre (6,000 to 25,000 per square inch) of tissue

.6. (a) Mathematically , Ohm's law is given by I∝VI= RV V=IRWhere v is the potential difference , I is the current and R is the resistance

(b)210